ApproveAPI Alternatives

API Monitor is a software that monitors and displays API calls made by applications and services. Its a powerful tool for seeing how Windows and other applications work or tracking down problems that you have in your own applications

Valgrind is an instrumentation framework for building dynamic analysis tools.

Trace system calls and signals. A diagnostic, debugging and instructional userspace utility.

C++ exception (and generic) stack trace debug suite

ltrace intercepts and records dynamic library calls which are called by an executed process and the...

C++ exception (and generic) stack trace debug suite

WinAPIOverride : This software allows you to monitor and/or modify any function of a process for any calling convention (stdcall or cdecl)

Monitor file system, Registry, process, thread and DLL activity in real-time.

SpyStudio is the best product to trace user-mode API calls on Windows.

DTrace is a performance analysis and troubleshooting tool for Solaris, Mac OS X and FreeBSD.

Perf is a simple app monitoring solution paired with meaningful alerts.

Deleaker finds memory leaks, GDI leaks, leaks of handles, USER objects and others. Available both as a Visual C++ extension and standalone application.

Sysdig is an open source, system-level exploration that capture system state and activity from a running Linux instance, then save, filter and analyze.